Although 70% of the earth is water, it can be used directly or not much. There are different levels of water supply in our cities. Desalination is the best way to solve this problem. Desalination is the conversion of seawater with high salinity to industrial use or drinking water.

At present, the seawater desalination method is a distillation method and a reverse osmosis method. Distillation is generally done in large desalination plants where there is sufficient heat. The reverse osmosis method has a high salt rejection rate and is widely used, and is widely used. Reverse osmosis method to desalinate seawater firstly pre-treats the seawater, then sterilizes and algae, flocculates and removes impurities, reverse osmosis, and removes odor.

Due to the large amount of sediment in the seawater and the large amount of algae and some colloids, the turbidity is high. To remove a large amount of impurities, flocculation and sedimentation are generally used. PAM is the best flocculant. Since PAM has a long molecular chain, the molecular chain carries a hydroxyl group and a charge, which can adsorb suspended matter in water to form a bridge, so that the dispersed suspension forms a large floc and precipitates to the bottom of the water. For the purpose of removing impurities, PAM is the most ideal flocculant for water treatment, easy to use, high impurity removal rate and low cost.